Riveter.



No. 838,441. PATBNTED OCT. 16, 1906. s. s. GASKBY'& s. 0. .BDND.

RIVETER.

APPLICATION EILED APR.4, 1902. RENEWED MAR. 16, 1906.

3 SHEETS-SHEET 1;

a gn uautozd/ 5 1 n doses PATENTED 00116, 1906. I 8.0.BON-D.

02- RENEWED MAR. 16, 1906.

S- S- OASKHY &

I RIVET APPLIOATION FILED APRA, 19

UNITED STATES PATENT OFFICE.

SAMUEL S. CASKEY, OF PHILADELPHIA, PENNSYLVANIAtAND SAMUEL C. BOND, OFWILMINGTON, DELAWARE; SAID BOND ASSIGNOR TO SAID CASKEY.

RIVETER.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed April 4, 1902. Renewed March 16, 1906. Serial No.306,347.

T0 at whom it may concern:

Be it known that we, SAMUEL S. CAsKEY, residing in the city and countyof Philadelphia, State of Pennsylvania, and SAMUEL C. BOND, residing atWilmington, in the county of Newcastle, State of Delaware, citizens ofthe United States, have invented a new and useful Improvement inRiveters, of which the following is .a specification.

Our inventionconsists of an improved construction of a fluid-pressureriveter or punch wherein the expense of production is reduced to aminimum and the construction simplified, whereby great power is obtainedat a minimum cost.

It further consists of an improved construction of a rivet-set, wherebyperfect alinement of the rivet-heads is assured.

. It further consists of novel means for clamping the plates togetherbefore final action on the rivets.

Itfurther consists in providing means whereby the excess of metal isutilized to cause the total pressure of the machine to act on therivet-head at the proper time.

Figure 1 represents a longitudinal sectional view of a fluid-pressureriveter or punch embodying our invention, a portion thereof being shownin elevation. Fig. 2 represents a side elevation thereof. Fig. 3represents an end elevation. Figs. 4 and 5 represent a sectional view ofthe rivet-set employed, on an enlarged scale, showing the same indifferent positions. Fig. 6 represents a partial sectional view andpartial elevation of the rivet-set as applied to a hammer. Figs. 7, 8,and 9 represent diagrammatic views of the valve employed in differentpositions.

Fig. 10 represents a sectional view of a portion of the head andplate-clamping piston on an enlarged scale.

Similar numeralsof reference indicate corresponding parts in thefigures.

Referring to the drawings, 1 designates the inlet for the motive fluidin the cylinderhead 2, which is preferably of semispherical shape in itsinner contour, whereby the curved inner wall 3 is formed.

4 designates a tube which is preferably exterior to the cylinder 5 andcommunicates with the interior of the cylinderhead 2 through the port 6,said tube having situated at substantially one end thereof theoperating-valve 7, said valve controlling the passage in said tube andalso controlling a port or passage 8, which leads to the interior of anauxiliary cylinder 9 and which thus forms with the tube 4 acommunication between the interior of the cylinder-head 2 and saidauxiliary cylinder 9. 10 desi ates a port or passa e likewise controlledy the valve 7 and w ch communicates with t e interior of thecylinder-head 11, which atter is always separated by thehollowiston 12from the cylinder-head 2, so that t ere is no communication between saidcylinder-heads 2 and 11 except as controlled by the valve 7, ashereinafter described. 13 designates the exhaust, which is alsocontrolled by said valve 7.

The cylinder-head 2 is provided with the rearward extension 14, in whichreciprocates the tail-rod 15, the latter having the enlarged portion 16,which is of substantially the same diameter as the inner bore of said.extension, whereby a shoulder is formed, a ainst which is held thepacking 17 by means o the follower 18 and the nut or other fasteningdevice 19, it being a parent that said tail-rod, packing-nut, an boltreciprocate in unison. The inner extremity of the tailrod 15 is securedwithin the piston 12'by means of the shoulder 20 and the sleeve 21,whereby it will be seen that said piston and tail-rod must move inunison. The tail-rod 15 is provided with the longitudinally-extendingchamber 22, which is of substantially the same diameter as the'aliningstationary rod 23, the end 24 of which latter enters the piston .12 andterminates a short diso tance from the extremity of the tail-rod 15 whenthe latter and its piston are in their extreme position, for example, intheir righthand position, as indicated in Fig. 1. The

rod 23 -extends freely through the packingclamping piston 31, which alsomoves 1n the auxiliary cylinder 9 and has one end extending therefromand passes through a suitable stuffing-box or packing 32, said pistonhaving the flange 33 moving in said auxiliary chamber 9 and which abutsagainst the shoulder 34 in its open position and against the shoulder 35in its closed position.

In the end wall of the plate-clamping piston 31 is a port or passage 36,which is in alinement (at the proper time) with the port or passage 29in the head 28, said port 36 leadin to a chamber 37 within theplateclamping piston 31, and in which is the rivetdriving piston 38,which is adapted to. move entering the same at the proper time.

therein and operate the rivet-driving bar 39, which is guided and movesin the rivet-set 40, which is suitably secured to or forms part of theplate-clamping piston 31 and has an opening 48 extending therethrough,into which the shank 49 of the rivet is adapted to enter and throughwhich the rivet-driving bar moves to act upon the rivet.

41 designates a hook or yoke which is suitably secured to or carries theoperating parts and also carries the anvil-bar 42, which sup: ports theusual anvil 43. I 44 designates a lever'which is suitably secured to thevalve 7 for operating the same.

, The operation is as follows: The parts being assumed to be in theposition seen in Fig. 1, the valve 7 will be in the position seen inFig. 7that is, the passages 4, 8, and are open. The motive fluid entersthe inlet 1 and passes through the ort 6 and passage in the tube 4 andthrougfi the passage 8 and into the auxiliary cylinder 9 and supportsthe plate-clam ing piston 31 in the position seen, which wi 1 occur byreason of the differential pressure areas below and above the same, itbeing seen that the motive fluid also passes through the port 10 intothe cylinder-head 11 and holds the hollow piston 12 in the positionseen, which will occur by reason of thedifferential pressure areas onthe opposite sides of said'piston 12. It will be understood that in theresent instance the piston 12 is partly filled? with a suitableliquid-such as oil, for exampleon the upper surface of which a pressureis at all times exerted by asuitable amount of motive fluid The plates45 and 46 are placed in position, with the rivet 47 in place on theanvil. The valve 7 is now turned to assume the position seen in Fig. 8;The passages 4 and 10 being closed, the passage 8, and 'conse uently theinterior ,of the auxiliarycylin er 9, is open to the exhaust 13. Byreason of the decrease in pressure on the under side of the flange 33(seeFig. 1) the ressure on the surface of the liquid in the ho lowpiston causes the liquid to pass through the passage 27 and the port 29into the chamber 30 and thence through the port or passage 36 to thechamber 37 and lowers the plate-clamping piston 31, carrying with it therivet-set 40 and the rivetdriving piston 38, the rivet-set andrivetdriving piston then being in the position seen in Fig. 4. The valve7 is now turned and assumes the osition seen in Fig. 9, the passage 4being cibsed, the passage 8 partly closed and the port or passage 10being open to the exhaust 13} This reduces the ressure on the hollowpiston 12 on the leftiand side, (see Fig. 1,) and the motive fluidentering the inlet 1 forces the hollow piston 12 over the rod 23. Thisimmediately cuts off communication between the interior of the hollowpiston 12 and the passage 27 and prevents the high-pressure liquid fromcommingling with the low-pressure liquid. The rod 23' being forced intothe passage 22 causes an accumulated or high pressure in the passage 27,which pressure is exerted upon the plate-clamping piston 31 and therivet-driving piston-38, whereby the plates are clamped together and thehead is formed on the rivet, as seen in Fig. 5. By the above it will beseen that perfect alinement of the rivet-heads is assured and the platesare clamped together before final action on the rivets. It will be seenthat the opening 48 in the rivet-set is of such size as to correspondwith the size of the shank of the rivet and that the set can be changedas is necessary, as is also the case with the rivet-driving bar 39. Itwill be noted that any excess of metal in the rivet in forming therivet-head 50 will flow under the rivet-set 40 and slightly raise thesame clear of the plate, whereby all the pressure of. the machine willact on the rivetead for evident purposes. It will be seen that weprovide a flange 51 on the rivet-driving barv 39, which will abutagainst the end of the rivet-set 40, whereby the proper shaped head willalways be formed on the rivet. In order to return the parts for the nextoperation, the valve 7 is turned to assume the position seen in-Fig, 7,whereby the motive fluid will pass through the passage in tube 4,through passage 8 into the auxiliary cylinder 9, and also through port10 in the cylinder-head 11, forcing back the hollow piston 12 andreturning the plate-clamping piston 31 to its former position, (seen inFig. 1,) and with it the rivet-driving piston 38 and the rivet-set 40and rivet-driving plug 39, and the parts are in position to repeat theabove-described operation.

In Fig. 6 we have shown the rivet-set 40 and rivet-driving bar 39 asapplied to a hammer, the operation of these parts being the same asabove described, the hammer operating the same by suitable pressuremeans.

It will be evident that various changes may be made by those skilled inthis art which will come within the scope of our invention, and we donot, therefore, desire to be limited in every instance to the exactconstruction herein shown and described.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. In a riveting device, a hollow rivet-set and plate-clamping device, arivet-driving bar, means for operating said set to bring the same inproper position whereby said set clamps the plates, means for operatingthe bar lndependently of said set to form the rivet, and means withinthe clamping device for engaging the inner end of the rivet-set to limitthe movement of said bar within the set and prevent its passagetherethrough whereby the head is formed within the set.

2. In a riveting device, a plate-clamping piston and rivet-set rigidwithrelation to each other to move in unison, said set having an openingtherethrough adapted to receive the shank of the rivet, a rivet-drivingbar movable in said 0 enin and means within 20 said piston and rigid Witsaid bar for engaging the inner end of the set to prevent the passa e ofthe driving-bar through said set, where y the head on the rivet isformed by said set within the lower end thereof.

SAMUEL S. CASKEY. SAML. C. BOND. Witnesses:

CLIFFORD V. MANNERING, L. ETHEL BoYoE 1

